public class VarDemo {
	public static void main(String [] args) {
		int number;
		
		number = 1;
		System.out.println(number);
		
		int data = 100;
		System.out.println(data);
		
		int data1 = 20,data2 = 30,data3 = 40;
		System.out.println(data1);
		System.out.println(data2);
		System.out.println(data3);
		
		data1 = 59;
		data3 = data1 + data2;
		System.out.println(data3);
		long data4 = 2000L;
		float data5 = 10.5f;
		double data6 = 20.6;
		double data7 = 0.123e4;
		boolean flag = true;
		System.out.println(data4);
		System.out.println(data5);
		System.out.println(data6);
		System.out.println(data7);
		System.out.println(flag);
		
		char c1 = 'A'; //在java 中字符char 类型使用的是unicode字符编码
		char c2 = '\u0041';
		char c3 = 65;
		System.out.println(c1);
		System.out.println(c2);
		System.out.println(c3);
		
		byte i = 10;
		double data8 = i;
		System.out.println(data8);
		
		data8 = 10.59;
		i = (byte)data8;
		System.out.println(i);
		
		int num1 = 65;
		char num2 = (char)num1;
		System.out.println(num2);
	}
	
}